Method of manufacturing metallic-oxid electrodes.



UNITED STATEEF {EFF} ROBERT W. DAVIS, 53., 613 WYANIDD'JJTI J, MICHIGAN, ASSIGNOR TS PENIQ'S'Z'I LVA' SALT MANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANZi-l, Br PORATION OF PENNSYLVANIA.

METHOD Oi MANUFACTURING IvIE'iALLIi'J-GXID ELECTRGDES" 1,039,071. fipecification of Letters Patent. P3559 Si-gr m H Drawing. -.-pplication iiiei. August 1.5, 1911. Serial 130. 644,565.

. v H I I To all whom it mm concern: results are usuall" obtained helou this term- Be it known that 1, ROBERT Wu-Jami peratorc, but above 600 degrees centigi'ude. DAVIS, Jr., a resident of iVyandotte, in the What I claim is:- county of Wzi'yne and State of Michigan, 1. In the nmnufa cture of electrodes 01' 5 have invented a new and useful. Method of similar articles thestep consisting of ex- 35 Manufacturing Metallic-Oxid Electrodes, posing steel or iron of the desired shape 2 of Which the following is a full clear, and hydrogen flame for a suiiicienttime to 11rdduce a substantial layer of ironoxid thereon; substantially as described. I

2. The method of making eicctrodes or 40 exact description.

My invention has relation to the manufac "we of electrodes for electrolytic purposcs' by converting metallic iron into a conduct similar articles, consisting in ice: iron ing oxid. A number of methods have hereor steci :u-ticles of the desired shone in :1 in? tofore been proposed for the manufacture nace clnnnber and burning hydrogen in oi these clcctrodes, but they have not proven said chamber to expose the ZHii'liGS to the 15 satisfactory in practice for various reasons, I flame for zisufiicicnttime to produce a in either because of the poor conductivity of stantialiayer of magnetic osid of iron thcrcthe resulting electrodes or from other causes. on; substantially as described,

it have disci'ivei'cd that i. can produce elec- 3. The method of making; electrodes or cs, consisting in exposing iron to a hydrogcn flame :it a temperature of 300 :30

l trodes of good conductivity and having a i mating of practically pure magnetic cxid I v Fen by heat-hug iron of any desired for :1 smiicient tinicto uilord a subs-tun shape in a furnace within which hydrogcn 5 ii i in er of s ll tintially purc magnetic gas is burned at a tcn'iperstnrc prc; stably I did thereon; subsmntiziliy us described. 1

l I l I l I l above 600 degrees ccnti "rode and daily in testimony vlherecf, i have ncrcunto set below 1101) degrees cchiig'rudc, The iron is my Land.

iiiirectly exposed Within inc furnace chamber R to the ac ion of the hydrogen flame r tcn'iperntm'cs above 1100 centign'nde Witnesseu:

1. ii. Gross,

the oxidation iSVQL'V rapid, but soinotiniies CARL ii. GOT'LS.

the conductivity is not us wood, and better 

